MoWTe2 Phase-Change Semiconductor Switching at Room Temperature
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Solution Overview
Problem
Existing semiconductor devices cannot efficiently switch between metal and insulating phases at room temperature, limiting their integration into large-scale silicon manufacturing and high-frequency applications.
Innovation Solution
Incorporating Mo x W 1-x Te 2 phase change material in semiconductor devices, where an externally controllable voltage differential induces a phase change between metal and insulator phases, enabling room temperature operation and improved switching speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional semiconductor materials are used, then manufacturing compatibility is maintained, but switching speed and phase change efficiency are limited
Solution Approach 1:
The patent employs Mo x W 1-x Te 2 phase change material as a composite material that combines the benefits of molybdenum and tungsten tellurides. This composite material enables fast switching between metal and insulator phases while maintaining compatibility with conventional silicon manufacturing processes, thereby resolving the contradiction between switching speed and ease of manufacture
Solution Approach 2:
The patent utilizes electric field-induced parameter changes in the Mo x W 1-x Te 2 material to switch between metal and insulator phases. By applying an externally controllable voltage differential, the material's electrical conductivity parameter changes dramatically, enabling fast switching speeds while the phase change occurs at room temperature, maintaining manufacturing compatibility
2Productivity
If phase change material is used for fast switching, then switching efficiency improves, but integration into existing silicon manufacturing becomes difficult
Solution Approach 1:
The Mo x W 1-x Te 2 phase change material undergoes parameter changes (electrical conductivity) in response to electric field application, enabling efficient switching. The phase transition occurs at room temperature and can be induced by voltage differentials achievable with standard semiconductor fabrication, thus improving switching efficiency while maintaining ease of manufacture
Solution Approach 2:
The patent uses an externally controllable voltage differential as an intermediary to induce phase change in the Mo x W 1-x Te 2 material. This intermediary approach allows the phase change to be controlled without requiring extreme temperatures or pressures, facilitating integration into existing silicon manufacturing processes while achieving high switching efficiency
3Speed
If high voltage fields are applied to induce phase change, then switching speed increases, but energy consumption increases
Solution Approach 1:
The Mo x W 1-x Te 2 material exhibits parameter changes in electrical conductivity in response to electric field application. The material's unique phase change characteristics allow for relatively low voltage differentials to induce rapid phase transitions, thereby achieving fast switching speeds while minimizing energy consumption compared to conventional materials that would require much higher voltage fields
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables fast and efficient switching between ON and OFF states with steep voltage transitions, enhancing high-frequency performance and compatibility with silicon manufacturing processes.
Implementation Method 1
an externally controllable voltage differential induces a phase change between metal and insulator phases
Implementation Method 2
The phase change material is controllably in one of metal and insulator phases depending on whether a voltage field greater than a predetermined electric field is present across the phase change material
Data Source
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AI summary
An exemplary semiconductor incorporates phase change material MoxW1-xTe2 that may be the semiconducting channel or may be part of a control terminal/gate of the semiconductor. The phase change material selectably being in one of metal and insulator phases depending on whether a voltage field greater than a predetermined phase change field is present at the phase change material. The properties of the semiconductor are varied depending on the phase of the phase change material.